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node_modules/core-js/modules/_regexp-exec-abstract.js

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+'use strict';
+
+var classof = require('./_classof');
+var builtinExec = RegExp.prototype.exec;
+
+ // `RegExpExec` abstract operation
+// https://tc39.github.io/ecma262/#sec-regexpexec
+module.exports = function (R, S) {
+  var exec = R.exec;
+  if (typeof exec === 'function') {
+    var result = exec.call(R, S);
+    if (typeof result !== 'object') {
+      throw new TypeError('RegExp exec method returned something other than an Object or null');
+    }
+    return result;
+  }
+  if (classof(R) !== 'RegExp') {
+    throw new TypeError('RegExp#exec called on incompatible receiver');
+  }
+  return builtinExec.call(R, S);
+};